Command line: -game parameter still runs editor

Hi.
According to Running Unreal Engine | Unreal Engine 5.0 Documentation, we can run the game without the editor directly from the command line like so:

UE4Editor.exe "[ProjectPath][ProjectName].uproject" -game

I’m using 4.15.3 and it always fires up the editor, not a standalone game anymore; neither through command line or a modified shortcut with -game in it.

Any hint ?

Regards.